Draft-rigging.



No. 640,094. Patenfed Dec. 26, I899. W. CASE.

DRAFT RIGGING.

. (Application filed Jun]: 21, 1899.)

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WITNESSES (Application filed June 21, 1 899.)

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Patented Dec. 26, I899.

No. 640,094. Patented Dec. 26, I899.

W. CASE.

DRAFT HIGGINS.

(Application filed June 21, 1899.) (No Model.) '5 Sheets-Sheet 3.

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No. 640,094. Patented Dec. 26, I899. W. CASE.

DRAFT RIGGING.

(Application filed June 21, 1899.) Modem 5 Sheets-Sheet 4,

WITNESSES INVENTOR WWW? Wzam M 2: Dkwkdsl k THE woRRls PETERS cc, Pnoroumcn WASHINGTON. u. c.

No. 640,094. Patented Dec. 26, I899.

W. CASE.

' DRAFT RIGGING.

(Application filed June 21, 1899.)

5 Sheets-Sheet 5.

(.No Model.)

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INVENTOR 1H: Norms PETERS co. FHOTCLLH'FKL, vwswmcrouv UNITED STATES PATENT OEEICE.

l/VILLIAM CASE, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE NATIONAL MALLEABLE CASTINGS COMPANY, OF CLEVELAND, OHIO.

DRAFT-RIGGING.

SPECIFICATION forming part of Letters Patent No. 640,094, dated December 26, 1899.

Application filed June 21 1399.

T aZZ whom it may concern:

Be it known that 1, WILLIAM CASE, of Chicago, in the county of Cook and State of Illinois, haveinven ted a new and useful Improvement in Draft-Riggings, of which the followupon the draft-rigging shown and described in my prior patent, No. 564,867, granted 'to me on July 28, 1896, the purpose of my present invention being to cheapen the construction and to render the device more efficient in operation.

-In the drawings, 2 represents the shank of a draw-bar applied to a car, and 3 and 4 are draft-irons or cheek-pieces, which are secured to the draft-timbers 3 4 on opposite sides of the draw-bar.

The construction so far as' now described may be the same as that of my prior patent. The cheek-pieces are formed at their end with lugs 5 5 and 6 6, against which the end followers of the springs bear and which serve as stops therefor.

7 is a strap or yoke, the branches of which are fixed to the draw-bar and extend thence to and around the movable parts of the draftrigging, inclosing the same.

8 and 9 are the coiled springs of the draftrigging, which are set in tandem between the legs of the strap in line with each other and are preferably double, each being formed of two concentric helices. The rear end of the spring 9 bears against a follower 10, preferably forming part of a box 11, which incloses the spring on two or more sides thereof and has at its front end a follower 12, which is interposed between the ends of the two springs.

The end follower 14 of the spring 8 bears against the rear end of the draw-bar, and'a stem 15 abuts against said follower and extends thence axially through the spring 8, having an extension or thimble 15,-which extends into the axis of the stem 9 and serves Fig.2 is a Serial No. 721,396. (No model.)

to center the stem 15. On this stem is also a projecting shoulder or follower 13, which is in the box and bears against the front end of the spring 9.

On the inner sides of the cheek-pieces 3 and 4 are stop-lugs 16 16, interposed between the followers 12 and 14 and designed to act as stops to limit the back motion of the follower 14 in buffing and the forward motion of the follower 12 in pulling. The followers themselves are guided by and between the cheekpieces 3 and t, which are formed suitably for that purpose.

As a further stop device, which may be used in addition to or without the stop 16, I form projecting lugs 73 on the follower 13, back of a stop-shoulder c on the cage 11. This stopshoulder restricts the motion of the follower 13 within the required limits.

\Vhen the buffing impact is imparted to the draw-bar, it is transmitted directly to the follower 11 and moves it rearwardly, compressin g the spring 8, the tension of which is transmitted by the follower 12 and box 11 to the stop 6, and the back motion of the follower 14 is transmitted by the stem 15 and the follower 13 to the spring 9, which is compressed thereby within the box 11, the follower 13 and stem 15 moving telescopically within the box, as will be readily understood.

When a pulling strain is imparted to the draw-bar, it is transmitted by the strap 7 to the end follower of the box 11, and said follower, with the box 11 and follower 12, are pulled forward. The effect-of this is to compress the spring 9 against the follower 13, which is held stationary by the bearing of the stem against the follower 14, which in turn is backed by the stops 5, and the forward motion of the follower 12 also compresses the spring 8, which is backed by the follower 14 and the stops 5.

During the operation of the device, either in pulling or buffing, the stops 16, being between the followers 12 and 14:, act perfectly to limit their motion in either direction. It will be noted that one stop on each cheekpiece suffices, and this simplification of the device tends greatly to economy.

My device is very simple and compact in construction, and by reason of these causes and of its great strength is well adapted to meetall the conditions of use to which a draftrigging is subjected.

The parts 10 and 11 may be made separate from each other instead of being integral,

and if so the parts 11 and 12 maybe made integra In Fig. 3 I show a modification of my invention, which is substantially like the construction illustrated in Figs. 1 and 2, except that the cheek-pieces 3 and 4 are replaced by draft-irons 17 17, on which are formed the stops 5, 6, and 16', which limit the motion of the followers, as above explained.

In Fig. 4 I show a construction in which the stem 15 is made integral with the end follower 14 and in a separate piece from the follower 13. The thimble 15 extends inwardly from the follower 13, and from the opposite end from the box or cage 11 there also extends a thimble or projection 10,which is adapted to engage with the end of the thi1n-- ble 15 at the end of the back motion of the latter and to serve as a supplemental stop.

In Fig. 5 I show a modification which is like the other figures in respect of the stop 16, but the follower 12 is made integral with the cage or box 11, and the end follower 10' is made in a separate piece from the latter. In this figure also I show the follower 13 integral with the stem 15 but without any projecting thimble.

Fig. 6 shows the parts of the draft-rigging reversed in position, the arrangement in this regard being the same as in my prior patent, No. 564,867.

These modifications will serve to illustrate the various ways in which those skilled in the art may change the construction of my device without departure from the principle of my invention, the novel features of which, as compared with the draft-rigging of my prior patent, are stated in the following claims, since What I claim is 1. A draft-rigging having springs arrange in tandem,followers at the ends of the springs intermediate followers, connections from th end follower of each spring to the intermedi ate follower of the other, and a stop arranger between the end follower of one'spring ant the intermediate follower of the other adapt ed to limit the motion of both of said last named followers; substantially as described 2. A draft-riggin g having springs arrange; in tandem,followers at the ends of the springs and a stem extending from one of thesq followers through the adjacent spring am having an extension or thimble terminating within the other spring by which said stem is centered, and having also a follower bear ing against the last-named spring; substan tially as described.

3. A draft-rigging having springs arrangec' in tande1n,a box or cage which is fitted around one of said springs and bears against the other, a stem extending thereinto, having 2 follower which bears against the spring in the cage or box, and having an extension or thimble which terminates within said spring for centering said stem; substantially as described.

4. A draft-riggin g having springs arranged in tandem,followers at the ends of the springs, and a stem extending from one of these followers through the adjacent spring and hav ing an extension or thimble terminating within the other spring for centering said stem, and having also a follower bearing against the last-named spring, said stem being made integral with the said follower and the thimble; substantially as described.

In testimony whereof I have hereunto set my hand.

WILLIAM CASE. l/Vitnesses:

T. H. ROBINSON, FREDERICK R. ANGELL. 

